Abstract: An online system updates the labels on negative examples to account for the possibility that the example is a false negative. The system generates a set of initial training examples that each include a query input by the user and item data for an item presented as a result to the user's query. Each training example also includes an initial label, which represents whether the user interacted with the item presented as a search result. The online system updates the initial label for a negative training example by identifying a set of bridge queries and computing a similarity score between the query for the training example and the bridge queries. The online system computes an updated label for the negative example based on the similarity scores and updates the training example with the updated label.

Abstract: This invention discloses a method for comprehensively apportioning the source contribution to fine particular matter (PM2.5) based on the receptor model and the chemical transport model, which comprises the receptor model calculation steps, chemical transport model calculation steps and comprehensive source apportionment steps; the said comprehensive source apportionment step comprises the following sub-steps: according to the principle of inverse proportionality between uncertainty and weight coefficient, the first (receptor model) uncertainty and the second (chemical transport model) uncertainty are normalized to obtain their respective weight coefficients; the comprehensive source apportionment results are calculated based on the apportionment results of the receptor model and the chemical transport model, and their respective weight coefficient.

Abstract: A treatment agent for an electronic-grade low-dielectric fiberglass cloth, and a preparation method thereof are provided. The treatment agent for an electronic-grade low-dielectric fiberglass cloth is prepared from the following raw materials in weight percentages: a coupling agent A: 0.6% to 1.2%, a coupling agent B: 0.3% to 0.8%, a coupling agent additive: 0.01% to 1.5%, an alcohol: 0.1% to 0.5%, an acid: 0.1% to 0.5%, and water: the balance, where the coupling agent A is a vinyl-containing coupling agent; the coupling agent B is a vinylbenzyl-containing coupling agent; and the coupling agent additive is a salt of a maleic anhydride (MA)-grafted copolymer. On the basis of meeting the low dielectric performance, the treatment agent of the present disclosure improves the binding performance of the low-dielectric fiberglass cloth to a low-dielectric customer resin and enhances the mechanical performance and heat resistance of the low-dielectric fiberglass cloth.

Abstract: Provided is a method for determining a respiratory phase, applied to a ventilation therapy device including a respiratory conduit. The method includes: acquiring a gas flow value of the respiratory conduit, and acquiring a pressure value of a pressure sensor, wherein the pressure sensor is used for collecting a pressure in the respiratory conduit; converting the gas flow value and the pressure value into a first value and a second value under a same reference; and determining a current respiratory phase of a patient based on a difference of the first value and the second value.

Abstract: A gesture-based display interface control method and apparatus, a device and a storage medium, belonging to the technical field of intelligent devices. The method includes: acquiring a first gesture of a user, and determining whether the first gesture is kept for more than a preset time; if the first gesture is kept for more than the preset time, displaying a target virtual gesture point on the current display interface; and acquiring a second gesture of the user, and moving the target virtual gesture point on the current display interface according to the second gesture. According to the method, the virtual gesture point is displayed on the display interface, and the virtual gesture point is randomly moved on the display interface, so that any interactive control on the current display interface can be operated, and gesture control is more intelligent and comprehensive while improving the accuracy of gesture control.

Abstract: The subject matter includes a smart device control method, comprising: receiving a device control instruction, and acquiring device distance information respectively between the first positioning device and each smart device, and between the second positioning device and each smart device: calculating a LOS deviation angle between a wearer of the head-mounted device and each of the smart devices based on the device distance information, wherein the LOS deviation angle is an angle between the wearer's direct LOS and a relative direction of the device, and the relative direction of the device is a direction of a line connecting a midpoint of a connection between the first positioning device and the second positioning device to the smart devices: and determining a smart device with a LOS deviation angle less than a pre-set value as a to-be-controlled device, and sending a device control instruction to the to-be-controlled device.

Abstract: Provided are a bone conduction-based eating monitoring method and apparatus, a terminal device, and a storage medium, the method including monitoring, by means of smart glasses, a chewing behavior for food being eaten to obtain a vibration signal of skull related to the chewing behavior; counting the number of chews according to the vibration signal to obtain the number of consecutive chews; and if the number of consecutive chews does not reach a target number of chews and the chewing behavior of a user terminates, sending first prompt information; if the number of consecutive chews reaches the target number of chews, sending second prompt information.

Abstract: A treatment agent for an electronic-grade low-dielectric fiberglass cloth, and a preparation method thereof are provided. The treatment agent for an electronic-grade low-dielectric fiberglass cloth is prepared from the following raw materials in weight percentages: a coupling agent A: 0.6% to 1.2%, a coupling agent B: 0.3% to 0.8%, a coupling agent additive: 0.01% to 1.5%, an alcohol: 0.1% to 0.5%, an acid: 0.1% to 0.5%, and water: the balance, where the coupling agent A is a vinyl-containing coupling agent; the coupling agent B is a vinylbenzyl-containing coupling agent; and the coupling agent additive is a salt of a maleic anhydride (MA)-grafted copolymer. On the basis of meeting the low dielectric performance, the treatment agent of the present disclosure improves the binding performance of the low-dielectric fiberglass cloth to a low-dielectric customer resin and enhances the mechanical performance and heat resistance of the low-dielectric fiberglass cloth.

Abstract: Disclosed is a control method for an audio device, the audio device includes a playing component and a display screen rotatably connected to the playing component, and the control method for the audio device includes the following steps: detecting a position of a user; determining a rotation mode of the display screen according to the position; acquiring a display expression corresponding to the rotation mode; and displaying the display expression on the display screen, and controlling the display screen to operate according to the rotation mode. This disclosure further provides an audio device and a computer-readable storage medium. This application improves the user's interaction experience with the audio device.

Abstract: Disclosed is a control method for an audio device, the audio device includes a wireless charging module and a display screen, and the control method for the audio device includes the following steps: in response to detecting a mobile device is placed on the audio device, acquiring a screen placement state of the mobile device, the screen placement state includes at least one of a screen flat state, a screen horizontal state and a screen vertical state; and displaying display content of the display screen on a screen of the mobile device according to the screen placement state. This disclosure further provides an audio device and a computer-readable storage medium. The problem that the display effect of the display screen of the audio device will be affected when the audio device performs wireless charging for the mobile device has been solved.

Abstract: A gesture-based display interface control method and apparatus, a device and a storage medium, belonging to the technical field of intelligent devices. The method includes: acquiring a first gesture of a user, and determining whether the first gesture is kept for more than a preset time; if the first gesture is kept for more than the preset time, displaying a target virtual gesture point on the current display interface; and acquiring a second gesture of the user, and moving the target virtual gesture point on the current display interface according to the second gesture. According to the method, the virtual gesture point is displayed on the display interface, and the virtual gesture point is randomly moved on the display interface, so that any interactive control on the current display interface can be operated, and gesture control is more intelligent and comprehensive while improving the accuracy of gesture control.

Abstract: A method for preparing a pyridine compound substituted with trifluoromethylthio, difluoromethylthio or trifluoromethyl in the meta position is provided, which includes S1. in a glove box filled with nitrogen, adding a catalyst, a solvent, pinacolborane, and pyridine to a reaction flask, stirring the mixture, and performing a reaction at 40-100° C. for 2-12 hours to obtain dihydropyridine; S2. adding a trifluoromethylthio reagent, a difluoromethylthio reagent, or a trifluoromethyl reagent to the reaction flask, stirring the mixture, and performing a reaction at room temperature to 80° C. for 2-12 hours to obtain trifluoromethylthio-, difluoromethylthio- or trifluoromethyl-substituted dihydropyridine; and S3.

Abstract: A method for preparing a pyridine compound substituted with trifluoromethylthio, difluoromethylthio or trifluoromethyl in the meta position is provided, which includes S1. in a glove box filled with nitrogen, adding a catalyst, a solvent, pinacolborane, and pyridine to a reaction flask, stirring the mixture, and performing a reaction at 40-100° C. for 2-12 hours to obtain dihydropyridine; S2. adding a trifluoromethylthio reagent, a difluoromethylthio reagent, or a trifluoromethyl reagent to the reaction flask, stirring the mixture, and performing a reaction at room temperature to 80° C. for 2-12 hours to obtain trifluoromethylthio-, difluoromethylthio- or trifluoromethyl-substituted dihydropyridine; and S3.

Abstract: A sensor device is for detecting metal. The sensor device may have a substrate, an electrode on the substrate, and a biopolymer-metal composite film on the electrode. The biopolymer-metal composite film may include a metal and a biopolymer. The sensor device may further have circuitry coupled to the electrode and configured to apply a sensing signal to the electrode.

Abstract: Disclosed is a control method for an audio device, the audio device includes a playing component and a display screen rotatably connected to the playing component, and the control method for the audio device includes the following steps: in response to detecting rotation of the display screen, acquiring a first rotation direction and a first rotation angle of the display screen in a preset three-dimensional coordinate system; determining a second rotation direction and a second rotation angle of display content on the display screen according to the first rotation direction and the first rotation angle, where the first rotation direction is opposite to the second rotation direction, and a difference between the second rotation angle and the first rotation angle is less than or equal to a preset value; and adjusting a display orientation of the display content according to the second rotation direction and the second rotation angle.

Abstract: Disclosed is a control method for an audio device, the audio device includes a playing component and a display screen rotatably connected to the playing component, and the control method for the audio device includes the following steps: detecting a position of a user; determining a rotation mode of the display screen according to the position; acquiring a display expression corresponding to the rotation mode; and displaying the display expression on the display screen, and controlling the display screen to operate according to the rotation mode. This disclosure further provides an audio device and a computer-readable storage medium. This application improves the user's interaction experience with the audio device.

Abstract: Disclosed is a control method for an audio device, the audio device includes a playing component and a display screen rotatably connected to the playing component, and the control method for the audio device includes the following steps: in response to detecting rotation of the display screen, acquiring a first rotation direction and a first rotation angle of the display screen in a preset three-dimensional coordinate system; determining a second rotation direction and a second rotation angle of display content on the display screen according to the first rotation direction and the first rotation angle, where the first rotation direction is opposite to the second rotation direction, and a difference between the second rotation angle and the first rotation angle is less than or equal to a preset value; and adjusting a display orientation of the display content according to the second rotation direction and the second rotation angle.

Abstract: Disclosed is a control method for an audio device, the audio device includes a wireless charging module and a display screen, and the control method for the audio device includes the following steps: in response to detecting a mobile device is placed on the audio device, acquiring a screen placement state of the mobile device, the screen placement state includes at least one of a screen flat state, a screen horizontal state and a screen vertical state; and displaying display content of the display screen on a screen of the mobile device according to the screen placement state. This disclosure further provides an audio device and a computer-readable storage medium. The problem that the display effect of the display screen of the audio device will be affected when the audio device performs wireless charging for the mobile device has been solved.

Abstract: The present application discloses a lip-language recognition AAC system based on surface electromyography, which includes: a training subsystem configured to collect the facial and neck EMG signals during lip-language movements through the high-density electrode array, improve the signal quality through the signal preprocessing algorithm, classify the lip-language movements through the classification algorithm, select the optimal number of electrodes and optimal positions through the channel selection algorithm, and establish the optimal matching template between the EMG signals and the lip-language information, and upload it to the network terminal for storage; and a detection subsystem configured to collect the EMG signals at the optimal positions during the lip-language movements based on the optimal number and positions of electrodes selected by the training subsystem, call the optimal matching template, classify and decode the EMG signals, recognize the lip-language information, and convert it into corre

Abstract: A pronunciation function evaluation system based on array high-density surface electromyography, this system includes a host computer and a slave computer, the slave computer is configured to obtain faciocervical electromyography signal through electromyography electrode arrays in a pronunciation process and to transmit the faciocervical electromyography signals to the host computer; the host computer is configured to analyze a physiological relevance between faciocervical array high-density electromyography signal features change and pronunciation function in the pronunciation process, to establish a three-dimensional dynamic energy distribution diagram of faciocervical muscular movement in the pronunciation process, to obtain dynamic visual temporal and spatial characteristic of articulatory muscles related to pronunciation, to extract electromyography features, to establish a faciocervical electromyography feature distribution standard database with normal pronunciation function, and to analyze a dysfuncti